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56 lines
1.5 KiB
Python
56 lines
1.5 KiB
Python
import pytest
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import math
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from pytest import approx
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from pytest_check import check
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def check_volume(shape, volume, dim=3):
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from netgen.occ import OCCGeometry
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geo = OCCGeometry(shape, dim=dim)
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m = geo.GenerateMesh()
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assert len(m.Elements2D()) > 0
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assert len(m.Elements1D()) > 0
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if dim==3:
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assert len(m.Elements3D()) > 0
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ngs = pytest.importorskip("ngsolve")
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mesh = ngs.Mesh(m)
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mesh.Curve(5)
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with check: assert ngs.Integrate(1.0, mesh) == approx(volume)
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def test_rect_with_two_holes():
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occ = pytest.importorskip("netgen.occ")
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face = occ.WorkPlane().Rectangle(7,4) \
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.Circle(2,2,1).Reverse() \
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.Circle(5,2,1).Reverse().Face()
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check_volume(face, 7*4-2*math.pi, 2)
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def test_unit_square():
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occ = pytest.importorskip("netgen.occ")
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check_volume(occ.unit_square.shape, 1, dim=2)
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def test_box_and_cyl():
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occ = pytest.importorskip("netgen.occ")
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box = occ.Box(occ.Pnt(0,0,0), occ.Pnt(1,1,1))
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check_volume(box, 1)
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r = 0.3
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h = 0.5
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vcyl = r*r*math.pi*h
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cyl = occ.Cylinder(occ.Pnt(1,0.5,0.5), occ.X, r=r, h=h)
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check_volume(cyl, vcyl)
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fused = box+cyl
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check_volume(fused, 1+vcyl)
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def test_internal_face():
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occ = pytest.importorskip("netgen.occ")
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box = occ.Box((0,0,0), (3, 1, 10))
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face = occ.WorkPlane(occ.Axes((1.5,0,0), occ.X, occ.Y)).Rectangle(1, 6).Face()
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shape = occ.Glue([box, face])
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geo = occ.OCCGeometry(shape)
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mesh = geo.GenerateMesh(maxh=0.5)
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assert any(mesh.Elements2D().NumPy()['index'] == 8)
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